Father Steve Halipilias, brother Spiro and mother Sophie make an emotional plea for witnesses to come forward over the fatal stabbing of Phillip Halipilias. Photo: Daniel Hurst

Mrs Halipilias, alongside husband Steve Halipilias and son Spiro Halipilias, have made an emotional plea for witnesses to come forward to help police track down the person who inflicted the fatal upper-body stab wounds.

The family said anyone withholding information from police was just as ``cowardly'' as the killer.